The main reasons are as follows:

1. Unable to install through some third-party software downloads: If the software downloaded from the third-party application store cannot be installed, it is recommended to use the mobile phone to push it simultaneously. Bind APPLE ID to download and install again.

2. There is a problem with the installation package: for example, it is incomplete or the signature is inconsistent. In this case, you can try to re-download it through Synchronous Push and then install it.

3. The mobile phone storage space is full: clean up the mobile phone memory, delete uncommon software and try installation again.

4. Download using data network: You cannot download software exceeding 100m using data network, please change to wifi download.